BunnyGirl

Does anyone know which wheel that would be? I took my car in yesterday for the blinking TPMS light. Their computer said it was "tire number 2" that was defective. I asked the person what wheel that would be, wondering if it was the one I had gotten the flat on that needed to be fixed. He said he didn't know. He didn't fix the cars, just that the tech told him tire number two was the bad one. LOL Anyway, I guess I'll know for sure next week when I take it back in for the replacement. I didn't have time to wait for them yesterday to send the part over from the warehouse and then go through the process of changing it out and reprogramming it to the car.

dtorre

Front Passenger tire assuming you have the tpms in their original location as far as placement on the car goes

BunnyGirl

Well, I've had my tires rotated, so I'm not sure if that makes a difference now. I thought it was probably that one, since it seems to be in other people's cars that actually tell them which tire has a problem. I just don't know if that changes when they get rotated, and I haven't looked at the rotation guide that shows which way they go to know what other one it might be.

BunnyGirl

My understanding is that with each valve stem is a wireless transmitter and the receiver for the transmitters is in the center of the dash area. I don't know if there is anything additional with it or not. Based on this, I would think the sensors, themselves, are numbered, which may be why they said they didn't know for sure which wheel it was yet.

I was told that to know positively they would do one tire at a time and let the air out and the one that didn't trip the solid light and beep was the problem sensor. After they know that, they then unmount the tire, change out the sensor, remount the tires, let it sit for 15 minutes totally away from any other vehicles that may have the sensors to let it reprogram itself, then drive it for 15 minutes also for reprogramming, and then let it sit again. This is why I didn't have time to wait yesterday. LOL Of course, I'll be about due for a tire rotation next Monday, so I'll have them do that at that time, too.

jrx13

what they told you is right..... because of tire rotations, etc. the mazda scan tool cannot tell you which tire is #2. You have to deflate or inflate the tire to find the one wheel unit that is not responding.

Did you recently have tire work done. A lot of tire shops have damaged the sensors because they don't have experience with them.

swoope

iTrader: (5)

really,

does anyone know if it can tell what sensor it is???? as is the reciver would pick up each sensor as a different unit..

and no the sensor would have no idea what tire it is, but it would know what corner of the car it was on..


beers

Razz1

wow I learned something about the tmps.

Thanks

swoope

iTrader: (5)

really?

i thought it was you that said the tpms could produce #s for lbs over the can bus?

maybe it was the guy that hates rb!!! prober..

beers

Stavesacre21

I figured that the TPMS could tell which tire it was, but wow...wouldn't it be helpful if there had been a 4 way direction LED on the display to point them out? Just splitting hairs now, but it sounded like a simple thing to do.

BunnyGirl

My sensors don't know if the tire is overinflated (or the computer doesn't), since when I had my flat repaired (back in September) they inflated my tire to 52 pounds and I got no light or beeps or anything. The manual on mine (06) only talks about it going off if the pressure is too low. No mention at all if there is too much air.

LionZoo

And you run Dunlops right? Man, they really seem to be attracting nails...

BunnyGirl

Mine acquired one at 7000.

dmc27

Black tape. Problem solved.

mzrx

would the number blinks per second tells you which sensor? has anyone pay attention to the blinks. I can't tell since I don't have the stock wheels on any more.

jrx13

When the tech hooks up the scan tool to vehicle and goes to the tpms menu, it will display four tpms sensors and their respective serial numbers. It will also show psi reading and temperature. Unforunately, you don't know which tire has which serial number applied to it.

So lets say you have the tire warning light on the dash, the tech hooks up and displays the screen and sees that three sensors show 32 psi and one sensor shows 20 psi. The tech would then check all the tire pressures with an ACCURATE tire guage and if they are all inflated to 32 psi the tech would suspect a faulty tpms sensor/wheel unit. The technician then has to eliminate the good three ones by raising or lowering each tires pressure until the tech finds that one tire that is inflated/deflated and does not show that the pressure changed on the screen.

The other method is too demount all four tires and check the serial number located on the tpms wheel unit. Of course, that takes much much longer and would not be reasonable.